Linux barebones quickstart: Difference between revisions

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Set up [[Ubuntu quickstart|Ubuntu]] or [[Centos quickstart|Centos]] or some small embedded whateverism...
Set up [[Ubuntu quickstart|Ubuntu]] or [[Centos quickstart|Centos]] or some small embedded whateverism...


=== Set up IP and hostname ===
==== (Optional) Change the IP ====
On home lan, dnsmasq doles out the ips based on MAC, make sure you have it configured with your MAC and an available IP.  Add it to hosts file, too.  Should be all you need!


If this is a VM clone, DO THIS NOW, NEVER LET A CLONE USE THE SAME IP, you will tear your clothes and spit on the ground!
If this is a VM clone, [[Set your IP|CHANGE YOUR IP NOW]] before you tear your hair out.
# for static IPs on ubuntu work machines:
  sudo emacs /etc/network/interfaces
# for static IPs on centos work machines:
  sudo emacs /etc/sysconfig/network-scripts/ifcfg-ens192
  service network restart
# example:
BOOTPROTO=none
IPADDR=10.122.82.241
NETMASK=255.255.255.0
GATEWAY=10.122.82.1
# For VMs, change network adapter if needed to match subnet (eg "LabNet8X")
# for virtualbox no changes were needed (as of yet)


=== Set up DNS ===
==== (Optional) Set up hostname ====
I used to always [[Systemd#DNS|turn off systemd-resolved]].  But as long as /etc/hosts is not a symlink, it should work fine.


=== Set up hostname ===
If you've cloned a VM, or you are using any "lite" OS that doesn't have an installer, you'll need to set your hostname to something unique, as a first step:
Note that this is not needed for a fresh install of ubuntu.  But if you've cloned a VM, you'll need to change hostname:
  sudo emacs /etc/hostname && sudo hostname newname  # use hostname cmd to set it right away
  sudo emacs /etc/hostname && sudo hostname newname  # use hostname cmd to set it right away
  # NOTE that systemd can also be used: sudo hostnamectl set-hostname newname
  # NOTE that systemd can also be used: sudo hostnamectl set-hostname newname
  # /etc/hosts changes should not be needed, if hostnames are properly configured (dnsmasq DNS -or- work DNS will provide resolution)
  # /etc/hosts changes should not be needed, if hostnames are properly configured (dnsmasq DNS -or- work DNS will provide resolution)


=== Install basic tools ===
==== (Optional) Set up user m ====
sudo apt install git curl emacs # ubuntu
sudo yum install git curl emacs # centos
git config --global user.email m@thedigitalmachine.com
git config --global user.name "Michael Behrns-Miller [##hostname##]"
 
=== Set up scripts ===
cd && mkdir development && cd development
git clone bitpost.com:development/scripts.git
./scripts/setup_linux.sh # to continue bootstrapping


That's it, get on with your life.
"Lite" OS installs will not add a user for you, so if you don't have user m, [[Add a user|add user m now]].


==== (Optional) Limit system log size ====


Prevent endless system logging [[Systemd#Log_limit|here]].


=== MIGRATION IN PROGRESS: config distro machine migration ===
=== Set up IP ===
Start to revamp config from [machine]/[distro] to [distro]/[machine] to match scripts.  It's not hard even though it's dangerous.  You can do each machine separately from others.  Get on it!
# DO THIS ALL IN ONE SESSION, do not log out
cd development/config
mkdir -p distro # prolly not needed
git mv machine/distro distro/machine
setup_stow.sh # repeat until it doesn't fail; check each failure to make sure it is a symlink, and simply rm them as you go


=== OLD ===
On home lan, bitpost dnsmasq doles out the ips based on MAC:
hostname # make note
ip address # make note of MAC - there may be more than one (eg: wired and wifi)
[bitpost#] emacs config/etc/dnsmasq.d/mdm_lan_dnsmasq.conf && sudo service dnsmasq restart
# reacquire IP on new box


moving all this to setup_linux.sh and mh-setup-linux command...
=== Copy ssh keys ===
sudo apt install openssh-server # if needed (usually)
ssh newbox # via password
# 2022 keys
mkdir -p .ssh/2022
[bitpost#] scp -r .ssh/2022/id_ed25519* newguy:.ssh/2022/
cd .ssh && ln -s 2022/id_ed25519 . && cat 2022/id_ed25519.pub >> authorized_keys
It's time to deprecate this one...
# 2018 keys
mkdir -p .ssh/2018
[bitpost#] scp -r .ssh/2018/id_rsa* newguy:.ssh/2018/
cd .ssh && ln -s 2018/id_rsa . && cat 2018/id_rsa.pub >> authorized_keys


  cd && ln -s development/scripts scripts
=== Install basic tools ===
  mkdir scripts/[distro]/[new machine]
  sudo apt update && sudo apt upgrade -y && sudo apt autoremove -y
  emacs -nw .bashrc
   
  # export PATH=$HOME/scripts/[distro]/[machine]:$HOME/development/scripts/[distro]/i3:$HOME/development/scripts/[distro]:$PATH
  sudo apt install git curl emacs-nox # ubuntu server
  sudo apt install git curl emacs    # ubuntu desktop
sudo yum install git curl emacs-nox # centos


Set up ssh
=== Set up scripts ===
# openssh-server defaults are ok but see /etc/ssh/sshd_config for details
  cd && mkdir development && cd development
  cd ~/.ssh
  git clone morosoph:development/scripts.git
  scp [another-working-setup]:.ssh/authorized_keys .
  ./scripts/setup_linux.sh [desktop|nodesk] # to continue bootstrapping
  scp [another-working-setup]:.ssh/id_rsa_3072_nopswd .
scp [another-working-setup]:.ssh/config .
ln -s id_rsa_3072_nopswd id_rsa
# also add any other private keys and run [chmod 400] on them


Set up config
That's it, get on with your life.
cd ~/development
git clone bitpost.com:development/config.git
cd config
mkdir -p [distro] && cd distro
cp -rp [existing machine] [new machine]
# EDIT IT ALL
# WARNING - EDIT ACTUAL SYSTEM FILES, NOT repo files, as those will get clobbered when you stow
# BACK EVERYTHING UP AS YOU GO until we get really good at this :-)
git add [new machine]
git commit -a -m "new machine" && git push
cd && ln -s /home/m/development/config/  optional:[gig]/  [distro]/[new machine] config

Latest revision as of 20:33, 27 January 2023

Install the distro

Set up Ubuntu or Centos or some small embedded whateverism...

(Optional) Change the IP

If this is a VM clone, CHANGE YOUR IP NOW before you tear your hair out.

(Optional) Set up hostname

If you've cloned a VM, or you are using any "lite" OS that doesn't have an installer, you'll need to set your hostname to something unique, as a first step: 

sudo emacs /etc/hostname && sudo hostname newname  # use hostname cmd to set it right away
# NOTE that systemd can also be used: sudo hostnamectl set-hostname newname
# /etc/hosts changes should not be needed, if hostnames are properly configured (dnsmasq DNS -or- work DNS will provide resolution)

(Optional) Set up user m

"Lite" OS installs will not add a user for you, so if you don't have user m, add user m now.

(Optional) Limit system log size

Prevent endless system logging here.

Set up IP

On home lan, bitpost dnsmasq doles out the ips based on MAC: 

hostname # make note
ip address # make note of MAC - there may be more than one (eg: wired and wifi)
[bitpost#] emacs config/etc/dnsmasq.d/mdm_lan_dnsmasq.conf && sudo service dnsmasq restart
# reacquire IP on new box

Copy ssh keys

sudo apt install openssh-server # if needed (usually)
ssh newbox # via password
# 2022 keys
mkdir -p .ssh/2022
[bitpost#] scp -r .ssh/2022/id_ed25519* newguy:.ssh/2022/
cd .ssh && ln -s 2022/id_ed25519 . && cat 2022/id_ed25519.pub >> authorized_keys

It's time to deprecate this one... 

# 2018 keys
mkdir -p .ssh/2018
[bitpost#] scp -r .ssh/2018/id_rsa* newguy:.ssh/2018/
cd .ssh && ln -s 2018/id_rsa . && cat 2018/id_rsa.pub >> authorized_keys

Install basic tools

sudo apt update && sudo apt upgrade -y && sudo apt autoremove -y

sudo apt install git curl emacs-nox # ubuntu server
sudo apt install git curl emacs     # ubuntu desktop
sudo yum install git curl emacs-nox # centos

Set up scripts

cd && mkdir development && cd development
git clone morosoph:development/scripts.git 
./scripts/setup_linux.sh [desktop|nodesk] # to continue bootstrapping

That's it, get on with your life.

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